Elastomer Mechanics of Cross-Linked Linear-Ring Polymer Blends

IF 5.1 Q1 POLYMER SCIENCE

ACS Macro Letters Pub Date : 2025-04-01 DOI:10.1021/acsmacrolett.5c00095

Siteng Zhang, Thomas C. O’Connor, Gary S. Grest, Ting Ge

引用次数: 0

Abstract

Cross-linking a blend of linear and ring polymers creates a new topology-based dual-network elastomer in which the two components differ significantly in their topology. We use molecular simulations and topological analysis to examine key mechanical properties as functions of ring polymer volume fraction ϕ_R. For ϕ_R < ϕ_R^*, where the rings begin to overlap, the network shear modulus G and the maximum stretch ratio λ_p are weakly dependent on ϕ_R. For ϕ_R > ϕ_R^*, entanglements trapped in the network are diluted as the rings overlap, leading to a significant decrease in G and an increase in λ_p with increasing ϕ_R. The peak tensile stress, σ_p, exhibits a maximum around ϕ_R^*, indicating an enhancement of network strength due to the stronger cohesion from the entanglements between linear and ring polymers.

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来源期刊

ACS Macro Letters 化学-

CiteScore

10.40

自引率

3.40%

发文量

209

审稿时长

1 months

期刊介绍： ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science. With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.